Rhodium metal is mainly used in catalytic converters for cars as it reduces nitrogen oxides in exhaust gases.
It is used as an industrial catalyst for nitric acid, acetic acid, hydrogenation reaction, etc.
  
It is also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
  
Chemical Industry, Electrical Industry, Electronic Industry